JPH0212293A - Display device - Google Patents
Display deviceInfo
- Publication number
- JPH0212293A JPH0212293A JP16105088A JP16105088A JPH0212293A JP H0212293 A JPH0212293 A JP H0212293A JP 16105088 A JP16105088 A JP 16105088A JP 16105088 A JP16105088 A JP 16105088A JP H0212293 A JPH0212293 A JP H0212293A
- Authority
- JP
- Japan
- Prior art keywords
- brightness
- display
- display device
- display screen
- external light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は表示装置に係わり、特にショウウィンドウに設
置され、外光の明るさに応じて表示面の輝度を自動的に
制御する機能を備えた表示装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a display device, and particularly to a display device installed in a show window and equipped with a function to automatically control the brightness of a display surface according to the brightness of external light. The present invention relates to a display device.
従来のこの種の表示装置にあっては、表示面の輝度は外
光の明るさに応じて調整するように構成されていなかっ
た。すなわち、表示装置の表示面の輝度は一定の輝度に
固定されているか、または表示面に直射日光があたって
いる場合、直射日光があたらない場合、夜で周囲が暗い
場合のそれぞれに対応する三段階程度に制御されるのが
通常であった。Conventional display devices of this type are not configured to adjust the brightness of the display surface in accordance with the brightness of external light. In other words, the brightness of the display screen of the display device is either fixed at a constant level, or has three brightness levels corresponding to when the display screen is exposed to direct sunlight, when there is no direct sunlight, and when the surroundings are dark at night. Normally, it was controlled in stages.
上述した従来の表示装置では外光の明るさに対応して表
示面の輝度を制御することができないために、外光が最
も明るい時に見易いように表示面の輝度を調整しておく
と、外光が暗くなった時に表示面が明るすぎて見えに（
くなり、他方外光が暗い時に見易いように表示面の輝度
を調整しておくと、外光が明るくなった時に表示面が白
くなって見えなくなるという問題があった。In the conventional display devices mentioned above, it is not possible to control the brightness of the display screen in response to the brightness of outside light, so adjusting the brightness of the display screen so that it is easy to see when the outside light is the brightest will improve the brightness of the outside light. The display surface is too bright to see when the light gets dark (
On the other hand, if the brightness of the display surface is adjusted so that it is easy to see when the outside light is dark, there is a problem that the display surface becomes white and becomes invisible when the outside light becomes bright.
本発明はこのような事情に謹みてなされたものであり、
外光の明るさに応じて表示面の輝度を自動的に調整する
ことができる表示装置を提供することにある。The present invention has been devised in consideration of these circumstances.
An object of the present invention is to provide a display device that can automatically adjust the brightness of a display surface according to the brightness of external light.
本発明は上記目的を達成するために、外光の明るさを検
出する光検出手段と、この光検出手段の出力信号をＡ−
Ｄ変換するＡ・Ｄ変換手段と、このＡ−Ｄ変換手段の出
力信号に基づいて表示面の輝度を制御する制御手段とを
含んで構成されることを特徴とするものである。In order to achieve the above object, the present invention includes a light detection means for detecting the brightness of external light, and an output signal of the light detection means.
The device is characterized in that it includes an A/D conversion means for performing D conversion, and a control means for controlling the brightness of the display surface based on the output signal of the A/D conversion means.
本発明に係わる表示装置では外光の明るさに応じて表示
面の輝度が調整されるので常に表示面が見易い状態に維
持される。In the display device according to the present invention, the brightness of the display surface is adjusted according to the brightness of external light, so that the display surface is always maintained in an easy-to-see state.
以下、本発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図には表示装置が設置されているショウウィンドウ
の状態が示されている。同図において、ガラス２０を通
して外光の明るさを検出する光センサ１００がガラス２
０に近接して設けられ、この先センサ１００は表示部を
有する表示装置本体１０と接続されている。FIG. 1 shows the state of a show window in which a display device is installed. In the figure, an optical sensor 100 that detects the brightness of external light through a glass 20 is connected to a glass 20.
0, and the sensor 100 is connected to a display device main body 10 having a display section.
第２図には本発明に係わる表示装置の一実施例の構成が
示されている。同図において、表示装置は外光の明るさ
を検出する光センサ１００と、増幅器１０２と、Ａ−Ｄ
変換器１０４と、対数変換を行うＰ−ＲＯＭ ｌ ０６
と、表示部１１０の表示面の輝度を制御する輝度制御部
１０８と、表示部１１０とから構成されている。FIG. 2 shows the configuration of an embodiment of a display device according to the present invention. In the figure, the display device includes an optical sensor 100 that detects the brightness of external light, an amplifier 102, and an A-D
Converter 104 and P-ROM l 06 that performs logarithmic conversion
, a brightness control unit 108 that controls the brightness of the display surface of the display unit 110 , and a display unit 110 .
上記構成において、外光の明るさが光センサ１００によ
り検出され、その検出出力は増幅器１００により所定の
レベルまで増幅されＡ−Ｄ変換器１０４に人力される。In the above configuration, the brightness of external light is detected by the optical sensor 100, and the detected output is amplified to a predetermined level by the amplifier 100 and input to the A-D converter 104.
Ａ−Ｄ変換器１０４でディジタル信号に変換された光信
号は外光の明るさと表示装置の表示面の輝度との関係を
示すテーブルが記憶されているＰ−ＲＯＭ １０６に入
力され、外光の明るさと表示装置の表示面の輝度とが整
合するように対数変換される。The optical signal converted into a digital signal by the A-D converter 104 is input to the P-ROM 106 which stores a table showing the relationship between the brightness of external light and the brightness of the display surface of the display device. Logarithmic transformation is performed so that the brightness matches the brightness of the display surface of the display device.
この対数変換された光信号は輝度制御部１０８に入力さ
れ、この輝度制御部１０８は表示部１１０の表示面の輝
度が、対数変換された光信号に応じた輝度になるように
輝度調整を行うための制御信号が表示部１１０に出力さ
れる。This logarithmically converted optical signal is input to the brightness control unit 108, and the brightness control unit 108 adjusts the brightness so that the brightness of the display surface of the display unit 110 corresponds to the logarithmically converted optical signal. A control signal for this is output to the display section 110.
この結果、表示部１１０の表示面は外光の明るさに応じ
て適当な輝度となるように調整される。As a result, the display surface of the display unit 110 is adjusted to have an appropriate brightness depending on the brightness of external light.
以上に説明したように本発明では外光の明るさに応じて
表示装置の表示面の輝度を自動的に調整するように構成
したので、外光の明るさが変化しても常に表示装置の表
示面が見易い状態に維持される。As explained above, the present invention is configured to automatically adjust the brightness of the display surface of the display device according to the brightness of outside light, so even if the brightness of outside light changes, the display device will always The display surface is maintained in an easy-to-read state.
第１図は本発明に係わる表示装置の設置状態を示す説明
図、第２図は本発明に係わる表示装置の一実施例の’ｄ
ｌｔ’ｆｔを示すブロック図である。
ｌＯ・・・・・・表示！ｆｆｉ、１００・・・・・・光
センサ、１０２・・・・・・増幅器、１０４・・・・・
・Ａ−Ｄ変換器、１０６・・・・・・Ｐ−ＲＯＭ、１０
８・・・・・・輝度制御部、１１０・・・・・・表示部
。
出 願 人 日本電気株式会社代 理 人
弁理士 山内梅雄ネ１図FIG. 1 is an explanatory diagram showing the installation state of a display device according to the present invention, and FIG. 2 is an explanatory diagram showing an example of the display device according to the present invention.
FIG. 2 is a block diagram showing lt'ft. lO...Display! ffi, 100... optical sensor, 102... amplifier, 104...
・A-D converter, 106...P-ROM, 10
8...Brightness control unit, 110...Display unit. Applicant: NEC Corporation Agent
Patent attorney Umeone Yamauchi 1
Claims (1)
するＡ・Ｄ変換手段と、 このＡ・Ｄ変換手段の出力信号を対数変換する対数変換
手段と、 この対数変換手段の出力信号に基づいて表示面の輝度を
制御する制御手段とを含んで構成されることを特徴とす
る表示装置。[Claims] A photodetection means for detecting the brightness of external light; A/D conversion means for converting the output signal of the photodetection means from analog to digital; and logarithmic conversion of the output signal of the A/D conversion means. 1. A display device comprising: a logarithmic conversion means for performing the conversion; and a control means for controlling the brightness of a display surface based on an output signal of the logarithm conversion means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16105088A JPH0212293A (en) | 1988-06-30 | 1988-06-30 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16105088A JPH0212293A (en) | 1988-06-30 | 1988-06-30 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0212293A true JPH0212293A (en) | 1990-01-17 |
Family
ID=15727654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16105088A Pending JPH0212293A (en) | 1988-06-30 | 1988-06-30 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0212293A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257674A (en) * | 1988-11-14 | 1993-11-02 | Yamaha Hatsudoki Kabushiki Kaisha | Engine construction for vehicle |
| KR19990073764A (en) * | 1998-03-03 | 1999-10-05 | 이종수 | Monitor device with adjustable brightness |
| WO2005057539A1 (en) * | 2003-12-13 | 2005-06-23 | Samsung Electronics Co., Ltd. | Display apparatus and conrol method thereof |
| JP2008165172A (en) * | 2006-12-27 | 2008-07-17 | Samsung Sdi Co Ltd | Ambient light sensing circuit and flat panel display having ambient light sensing circuit |
-
1988
- 1988-06-30 JP JP16105088A patent/JPH0212293A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257674A (en) * | 1988-11-14 | 1993-11-02 | Yamaha Hatsudoki Kabushiki Kaisha | Engine construction for vehicle |
| KR19990073764A (en) * | 1998-03-03 | 1999-10-05 | 이종수 | Monitor device with adjustable brightness |
| WO2005057539A1 (en) * | 2003-12-13 | 2005-06-23 | Samsung Electronics Co., Ltd. | Display apparatus and conrol method thereof |
| JP2008165172A (en) * | 2006-12-27 | 2008-07-17 | Samsung Sdi Co Ltd | Ambient light sensing circuit and flat panel display having ambient light sensing circuit |
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